Malicious PDF — malware analysis report

Static analysis result for SHA-256 7127b375f307ea47…

MALICIOUS

PDF

43.8 KB Created: 2020-08-02 13:42:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df0288b3fe15359693177dfaabb9e07d SHA-1: f0414c210af1d80503721a6bcd70262c84be4d31 SHA-256: 7127b375f307ea479e6383d667108cb9a58a67cde90f638bee5746037b374854
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised as a game walkthrough. This indicates a phishing or scam attempt. The PDF also contains a large number of links to external PDFs, many hosted on Shopify, suggesting a link farm or SEO manipulation tactic to drive traffic to malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=vampire+the+masquerade+bloodlines+walkthrough
    • http://files.marcwortmanbooks.com/uploads/1/3/1/0/131070688/metubi.pdf
    • http://files.wilcoprevention.org/uploads/1/3/1/4/131437740/29b296.pdf
    • http://files.spartanswolvesfc.com/uploads/1/3/1/0/131070336/remekeru_kigonadopujet_fuxitami_xeboxowonovoso.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/3291/9720/files/16744280611.pdf
    • https://cdn.shopify.com/s/files/1/0433/8148/9818/files/56781757640.pdf
    • https://cdn.shopify.com/s/files/1/0433/5671/7207/files/pilodukunuba.pdf
    • https://cdn.shopify.com/s/files/1/0434/7841/7558/files/peligu.pdf
    • https://cdn.shopify.com/s/files/1/0430/1383/2857/files/wejofutavogijegofunani.pdf
    • https://cdn.shopify.com/s/files/1/0428/7214/4038/files/82508632740.pdf
    • https://cdn.shopify.com/s/files/1/0438/4024/1829/files/26807989439.pdf
    • https://cdn.shopify.com/s/files/1/0437/6903/6958/files/engineering_mechanics_13th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/5214/6586/files/26796390763.pdf
    • https://cdn.shopify.com/s/files/1/0430/2585/8711/files/mugevejorinikibatojipu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f1a.bin
aca5df3cd3660aa912284386276615bd69ba6ddb313f677ec9a506ce45da3069		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F1A 5644 bytes
font_01_sfnt_off00007223.bin
e011f704a38dc44b8f8c65cf6b2f21536ddd73cb3cd0d673515d17169f651ba3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7223 9932 bytes
font_02_sfnt_off00009427.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9427 4324 bytes

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